revert NoServicesFoundException

Author: diegomarquezp

gapic-generator-java/src/main/java/com/google/api/generator/Main.java

@@ -15,7 +15,6 @@
 package com.google.api.generator;
 
 import com.google.api.generator.gapic.Generator;
-import com.google.api.generator.gapic.protoparser.NoServicesFoundException;
 import com.google.protobuf.ExtensionRegistry;
 import com.google.protobuf.compiler.PluginProtos.CodeGeneratorRequest;
 import com.google.protobuf.compiler.PluginProtos.CodeGeneratorResponse;
@@ -26,12 +25,7 @@ public static void main(String[] args) throws IOException {
     ExtensionRegistry registry = ExtensionRegistry.newInstance();
     ProtoRegistry.registerAllExtensions(registry);
     CodeGeneratorRequest request = CodeGeneratorRequest.parseFrom(System.in, registry);
-    try {
-      CodeGeneratorResponse response = Generator.generateGapic(request);
-      response.writeTo(System.out);
-    } catch (NoServicesFoundException ex) {
-      // If no services are found in the protos we will no-op
-      System.err.println("No services found to generate");
-    }
+    CodeGeneratorResponse response = Generator.generateGapic(request);
+    response.writeTo(System.out);
   }
 }

gapic-generator-java/src/main/java/com/google/api/generator/gapic/Generator.java

@@ -14,22 +14,19 @@
 
 package com.google.api.generator.gapic;
 
-import com.google.api.gax.rpc.StatusCode.Code;
 import com.google.api.generator.gapic.composer.Composer;
 import com.google.api.generator.gapic.model.GapicClass;
 import com.google.api.generator.gapic.model.GapicContext;
 import com.google.api.generator.gapic.model.GapicPackageInfo;
 import com.google.api.generator.gapic.model.ReflectConfig;
-import com.google.api.generator.gapic.protoparser.NoServicesFoundException;
 import com.google.api.generator.gapic.protoparser.Parser;
 import com.google.api.generator.gapic.protowriter.Writer;
 import com.google.protobuf.compiler.PluginProtos.CodeGeneratorRequest;
 import com.google.protobuf.compiler.PluginProtos.CodeGeneratorResponse;
 import java.util.List;
 
 public class Generator {
-  public static CodeGeneratorResponse generateGapic(CodeGeneratorRequest request)
-      throws NoServicesFoundException {
+  public static CodeGeneratorResponse generateGapic(CodeGeneratorRequest request) {
     GapicContext context = Parser.parse(request);
     List<GapicClass> clazzes = Composer.composeServiceClasses(context);
     GapicPackageInfo packageInfo = Composer.composePackageInfo(context);

gapic-generator-java/src/main/java/com/google/api/generator/gapic/composer/ClientLibraryPackageInfoComposer.java

@@ -29,7 +29,7 @@
 import com.google.api.generator.gapic.model.GapicPackageInfo;
 import com.google.api.generator.gapic.model.Sample;
 import com.google.api.generator.gapic.model.Service;
-import com.google.api.generator.gapic.protoparser.NoServicesFoundException;
+import com.google.common.base.Preconditions;
 import com.google.common.base.Strings;
 import javax.annotation.Generated;
 
@@ -44,9 +44,8 @@ public class ClientLibraryPackageInfoComposer {
   private static final String SERVICE_DESCRIPTION_HEADER_PATTERN = "Service Description: %s";
 
   public static GapicPackageInfo generatePackageInfo(GapicContext context) {
-    if (context.services().isEmpty()) {
-      throw new NoServicesFoundException("No services found to generate");
-    }
+    Preconditions.checkState(!context.services().isEmpty(), "No services found to generate");
+
     // Pick some service's package, as we assume they are all the same.
     String libraryPakkage = context.services().get(0).pakkage();
 

gapic-generator-java/src/main/java/com/google/api/generator/gapic/protoparser/NoServicesFoundException.java

@@ -115,7 +115,7 @@ public GapicParserException(String errorMessage) {
     }
   }
 
-  public static GapicContext parse(CodeGeneratorRequest request) throws NoServicesFoundException {
+  public static GapicContext parse(CodeGeneratorRequest request) {
     Optional<String> gapicYamlConfigPathOpt =
         PluginArgumentParser.parseGapicYamlConfigPath(request);
     Optional<List<GapicBatchingSettings>> batchingSettingsOpt =
@@ -176,7 +176,7 @@ public static GapicContext parse(CodeGeneratorRequest request) throws NoServices
             transport);
 
     if (services.isEmpty()) {
-      throw new NoServicesFoundException();
+      //throw new NoServicesFoundException();
     }
 
     // TODO(vam-google): Figure out whether we should keep this allowlist or bring

gapic-generator-java/src/main/java/com/google/api/generator/gapic/protoparser/Parser.java

@@ -42,6 +42,7 @@
 import com.google.protobuf.Descriptors.FileDescriptor;
 import com.google.protobuf.Descriptors.MethodDescriptor;
 import com.google.protobuf.Descriptors.ServiceDescriptor;
+import com.google.protobuf.compiler.PluginProtos.CodeGeneratorRequest;
 import com.google.showcase.v1beta1.EchoOuterClass;
 import com.google.showcase.v1beta1.TestingOuterClass;
 import com.google.testgapic.v1beta1.LockerProto;